dimorphism


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Related to dimorphism: Gender dimorphism

dimorphism

 [di-mor´fizm]
the quality of existing in two distinct forms. adj., adj dimor´phic, dimor´phous.
sexual dimorphism physical or behavioral differences associated with sex.
having some properties of both sexes, as in the early embryo and in some hermaphrodites.

di·mor·phism

(dī-mōr'fizm),
1. Existence in two shapes or forms; denoting a difference of crystalline form exhibited by the same substance, or a difference in form or outward appearance between individuals of the same species (for example, sexual dimorphism).
2. The occurrence in plants of two distinct forms of leaves or other parts in the same individual plant.
[G. di-, two, + morphē, shape]

dimorphism

(dī-môr′fĭz′əm)
n.
1. Biology The existence among animals of the same species of two distinct forms that differ in one or more characteristics, such as coloration, size, or shape.
2. Botany The occurrence of two distinct forms of the same parts in one plant, as in the juvenile and adult leaves of ivy.
3. Chemistry & Physics Dimorphic crystallization.

di·mor·phism

(dī-mōr'fizm)
Existence in two shapes or forms; denoting a difference of crystalline form exhibited by the same substance, or a difference in form or outward appearance between individuals of the same species.
[G. di-, two, + morphē, shape]

dimorphism

the occurrence of an organism in two forms, e.g. the male and the female (see SEXUAL DIMORPHISM). Dimorphism can occur in body form or in colour phases, e.g. the two-spotted ladybird which has a brown form with four red spots, and a red form with two dark spots. See GENETIC POLYMORPHISM.
References in periodicals archive ?
Sexual size dimorphism was estimated using an index (Lovich & Gibbons 1992) defined as the quotient between the sizes of the largest and smallest sex -1.
Sexual dimorphism in both number and amount of cuticular chemical compounds was expressed, as in many other Drosophila species (Ferveur, 2005; Ferveur and Cobb, 2010; Pavkovic-Lucic et al., 2016).
Thus, all the variables being statistically significant between the sexes clearly reflects the existence of definite sexual dimorphism between the sexes and that it is also influenced by food habits and ethnicity.
[10] in his study found that sexual dimorphism exists in ear dimensions between males and females with higher values in males.
These findings demonstrate the usefulness of the tibia for the differentiation of sexes based on dimorphism. Moreover, the differences were not uniform, as the difference in some measurements had a broader range than other measurements.
Harper, "Sexual dimorphism of the human corpus callosum from three independent samples: Relative size of the corpus callosum," American Journal of Physical Anthropology, vol.
Thus, rural communities are predicted to display greater levels of sexual dimorphism in lower limb rigidity than the urban sample.
In hummingbirds (Trochilidae), morphological traits play an important role in our understanding of origin, evolution, and species or populations delimitation (Bleiweiss, 1998; Roy et al., 1998; Graham et al., 2012) because these traits are related to flight ability, physiology and feeding adaptations, behavior and sexual dimorphism (Bleiweiss, 1998; Roy et al., 1998; Temeles et al., 2010; Graham et al., 2012; Berns & Adams, 2013).
Thus, the sexual dimorphism of the digestive tract discovered in this study may contribute to the energy requirement of reproduction, which requires females to intake and absorb more energy.
To determine if the degree of sexual dimorphism in each skull feature varied among localities, we used a two-way analysis of variance (ANOVA) for each character.
The evolution of reversed sexual size dimorphism in hawks, falcons and owls: a comparative study.
Shape variation: Sexual shape dimorphism was not significant in all the studied sites (P > 0.160 after Bonferroni correction).